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features
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support

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Description

Line 21 offers AI-powered live subtitles and captions to ensure seamless accessibility for digital content, streaming platforms and live events. Our hybrid approach combines AI automation and human expertise to deliver high-accuracy subtitles that adapts to industry-specific terminologies, accents, or niche references. Our AI Proofreader enhances real-time captions to reduce errors and make live experiences more engaging. Our solution is for event organizers and broadcasters who require high-quality, scalable captions. ASR solutions are often inaccurate and expensive, while traditional human captioning is costly and non-scalable. Line 21 bridges the gap by offering real time AI-enhanced subtitles that seamlessly integrate into event tech and stream workflows.

Description

Best-in-Market Speech-to-Text & Voice AI for Enterprises. Speechmatics delivers industry-leading Speech-to-Text and Voice AI for enterprises needing unrivaled accuracy, security, and flexibility. Our enterprise-grade APIs provide real-time and batch transcription with exceptional precision—across the widest range of languages, dialects, and accents. Powered by Foundational Speech Technology, Speechmatics supports mission-critical voice applications in media, contact centers, finance, healthcare, and more. With on-prem, cloud, and hybrid deployment, businesses maintain full control over data security while unlocking voice insights. Trusted by global leaders, Speechmatics is the top choice for best-in-class transcription and voice intelligence. 🔹 Unmatched Accuracy – Superior transcription across languages & accents 🔹 Flexible Deployment – Cloud, on-prem, and hybrid 🔹 Enterprise-Grade Security – Full data control 🔹 Real-Time & Batch Processing – Scalable transcription 🚀 Power your Speech-to-Text and Voice AI with Speechmatics today!

API Access

Has API No 

API Access

Has API Yes 

Screenshots View All

Screenshots View All

Integrations

Deepgram Yes 
Docker No 
Dograh No 
ElevenLabs No 
Facebook Yes 
HoduCC No 
LiveKit No 
MachinesFluent No 
Microsoft Teams Yes 
OpenAI Yes 
Python No 
Quickwork No 
Recall.ai No 
Sensay No 
Twitch Yes 
VMware Cloud No 
Vapi AI No 
Videolinq Yes 
YouTube Yes 
Zoom Yes 

Integrations

Deepgram No 
Docker Yes 
Dograh Yes 
ElevenLabs Yes 
Facebook No 
HoduCC Yes 
LiveKit Yes 
MachinesFluent Yes 
Microsoft Teams No 
OpenAI No 
Python Yes 
Quickwork Yes 
Recall.ai Yes 
Sensay Yes 
Twitch No 
VMware Cloud Yes 
Vapi AI Yes 
Videolinq No 
YouTube No 
Zoom No 

Pricing Details

$0.09/min
Pay as you go
Free Trial No 
Free Version No 

Pricing Details

$0 per month
480 minutes of speech-to-text free per month
(240 minutes of batch, 240 minutes of real-time)
(3,000 minutes of Voice Agent - Flow free per month)

Batch Transcription
$0.0050/min for Standard
$0.0083/min for Enhanced

Real-Time Transcription
$0.0067/min for Standard
$0.0117/min for Enhanced

20% discount over 500 hr/month for all transcription.
Plus, larger volume discounts are available for Enterprise.

Voice Agent - Flow
$0.0537 /min

20% volume discount over 100 hr/month for Voice Agents.
Plus, larger volume discounts are available for Enterprise.
Free Trial Yes 
Free Version No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Deployment

Web-Based Yes 
On-Premises Yes 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Customer Support

Business Hours Yes 
Live Rep (24/7) No 
Online Support Yes 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) Yes 
In Person No 

Types of Training

Training Docs Yes 
Webinars Yes 
Live Training (Online) Yes 
In Person Yes 

Vendor Details

Company Name

Line 21

Founded

2023

Country

United Kingdom

Website

line-21.com

Vendor Details

Company Name

Speechmatics

Founded

2006

Country

United Kingdom

Website

www.speechmatics.com

Product Features

Speech Recognition

Audio Capture Yes 
Automatic Form Fill Yes 
Automatic Transcription Yes 
Call Analysis Yes 
Concatenated Speech Yes 
Continuous Speech Yes 
Customizable Macros Yes 
Multi-Languages Yes 
Specialty Vocabularies Yes 
Speech-to-Text Analysis Yes 
Variable Frequency Yes 
Voice Recognition No 

Product Features

Emotion Recognition

Facial Emotions No 
Facial Expression Analysis No 
Machine Learning No 
Photo Emotions No 
Speech Emotions No 
Video Emotions No 
Written Text Emotions Yes 

Machine Learning

Deep Learning Yes 
ML Algorithm Library Yes 
Model Training Yes 
Natural Language Processing (NLP) Yes 
Predictive Modeling Yes 
Statistical / Mathematical Tools No 
Templates No 
Visualization No 

Natural Language Processing

Co-Reference Resolution No 
In-Database Text Analytics No 
Named Entity Recognition Yes 
Natural Language Generation (NLG) No 
Open Source Integrations No 
Parsing No 
Part-of-Speech Tagging No 
Sentence Segmentation No 
Stemming/Lemmatization No 
Tokenization No 

Speech Recognition

Audio Capture No 
Automatic Form Fill No 
Automatic Transcription Yes 
Call Analysis Yes 
Concatenated Speech No 
Continuous Speech Yes 
Customizable Macros No 
Multi-Languages Yes 
Specialty Vocabularies Yes 
Speech-to-Text Analysis Yes 
Variable Frequency No 
Voice Recognition Yes 

Transcription

AI / Machine Learning Yes 
Annotations No 
Audio/Video File Upload No 
Automatic Transcription Yes 
Collaboration Tools No 
File Sharing No 
For Manual Transcription No 
Full Text Search Yes 
Multi-Language Support Yes 
Natural Language Processing (NLP) Yes 
Playback Controls No 
Speech Recognition Yes 
Subtitles Yes 
Text Editor No 
Timecoding Yes 

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